MESON Chess Problem Database
Problem Display
PID: 15573 (3bn2B/KPN3rB/pQ6/r2Nk3/6qP/p5P1/4b3/3RR1n1 w - - 0 1)
Froberg, Johan Hilding Laurentius
Tidskrift for Schack, 1985
#2
11 + 10
| 1101 | BCSC Final | 1999-2000 |
| 5926 | Chess Solving Yearbook 2000 | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qf3
- 2.Qe6#
- 1...Qh5
- 2.Qe6#
- 1...Qe6
- 2.Qxe6#
- 1...Qxg3
- 2.Qe6#
- 1...Qa4
- 2.Qe6#
- 1...Qb4
- 2.Qe6#
- 1...Qc4
- 2.Qe6#
- 1...Qe4
- 2.Qe6#
- 1...Qf4
- 2.Qe6#
- 2.gxf4#
- 1...Qxh4
- 2.Qe6#
- 1...Qg5
- 2.Qe6#
- 1...Rxd5
- 2.Rxd5#
- 1...Qf3
- Tries
- 1.Se3?
- threat
- 2.Sxg4#
- 1...Qxg3
- 2.Qd4#
- 1...Qxh4
- 2.Qe6#
- 1...Qf5
- 2.Qd4#
- 1...Qe6
- 2.Qd4#
- 2.Qxe6#
- 1...Qg6
- 2.Qd4#
- 1...Qf3
- 2.Sc4#
- 2.Qd4#
- 2.Qe6#
- 1...Qh3
- 2.Sc4#
- 2.Qd4#
- 1...Qh5
- 2.Sc4#
- 2.Qd4#
- 2.Qe6#
- 1...Qd7
- 2.Sc4#
- 1...Qc8
- 2.Sc4#
- 2.Qd4#
- 1...Qa4
- 2.Qe6#
- 1...Qb4
- 2.Qe6#
- 1...Qc4
- 2.Sxc4#
- 1...Qd4
- 2.Qxd4#
- 1...Qe4
- 2.Qe6#
- 1...Qf4
- 2.Qe6#
- 1...Qg5
- 2.Sc4#
- 2.Qd4#
- 2.Qe6#
- 1...Ra4
- 2.Rd5#
- 1...Sf6
- 2.Qd6#
- 1...Bf6!
- threat
- 1.Rxe2+?
- 1...Qxe2
- 2.Qe6#
- 1...Qe4
- 2.Rxe4#
- 2.Qe6#
- 1...Sxe2!
- 1...Qxe2
- 1.Se3?
- Keys
- 1.Sf6!
- threat
- 2.Sxg4#
- 1...Qxg3
- 2.Qd4#
- 1...Qxh4
- 2.Sd7#
- 2.Qe6#
- 1...Rxh7
- 2.Qxa5#
- 1...Bxf6
- 2.Qxa5#
- 1...Sxf6
- 2.Qd6#
- 1...Qe6
- 2.Qd4#
- 2.Qxe6#
- 1...Qg6
- 2.Qe6#
- 1...Rg6
- 2.Qxa5#
- 1...Qf3
- 2.Sd7#
- 2.Qd4#
- 2.Qe6#
- 1...Qh3
- 2.Qd4#
- 1...Qf5
- 2.Qd4#
- 1...Qh5
- 2.Sd7#
- 2.Qd4#
- 2.Qe6#
- 1...Qd7
- 2.Sxd7#
- 1...Qc8
- 2.Qd4#
- 1...Qa4
- 2.Qe6#
- 1...Qb4
- 2.Sd7#
- 2.Qe6#
- 1...Qc4
- 2.Sd7#
- 1...Qd4
- 2.Qxd4#
- 1...Qe4
- 2.Sd7#
- 2.Qe6#
- 1...Qf4
- 2.Sd7#
- 2.Qe6#
- 1...Qg5
- 2.Sd7#
- 2.Qd4#
- 2.Qe6#
- 1...Ra4
- 2.Rd5#
- threat
- 1.Sf6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 11
- REMOVED MATES = 8
- Sets
- Q(d);N_GUARD::QAR1(F)
- Q(d);N_GUARD::QAR1(F),XQ(d)
- Q(d);N_GUARD,XP(C)::QAR1(F)
- Q(d);N_GUARD,N_SPINB(b)::QAR1(F)
- Q(d);N_GUARD,XP(D)::QAR1(F)
- R(e);OGATE,XS(E)::R1(A),XR(e)
- Tries
- Try
- S(E);N_PINB(b)
- Threat
- S(E),XQ(d)
- Vars
- Q(d);N_GUARD,XP(C)::QAB1(F)
- Q(d);N_GUARD,XP(D)::QAR1(F)
- Q(d);N_GUARD::QAB1(F)
- Q(d);N_GUARD::S(E)
- Q(d);N_GUARD::QAR1(F)
- Q(d);N_GUARD::S(E),XQ(d)
- Q(d);N_GUARD,P_PINQ(F)::QAB1(F),XQ(d)
- R(e);N_GUARD::R1(A)
- S(j);N_GUARD,N_SPINR(h)::QAB1(F)
- Refutation
- B(i);N_SPINR(h)
- Try
- R(B);CHECK,XB(b)
- Vars
- Q(d);XR(B)::QAR1(F)
- Refutation
- S(a);XR(B)
- Try
- Actual
- S(E);N_PINR(h)
- Threat
- S(E),XQ(d)
- Vars
- Q(d);N_GUARD,XP(C)::QAB1(F)
- R(h);XB(J)::QAR(F),XR(e)
- B(i);SBLOCK,XS(E)::QAR(F),XR(e)
- S(j);N_GUARD,XS(E)::QAB1(F)
- Q(d);N_GUARD::QAR1(F)
- R(h);::QAR(F),XR(e)
- Q(d);N_GUARD::QAB1(F)
- Q(d);N_GUARD::S(E),XQ(d)
- Q(d);N_GUARD::S(E)
- Q(d);N_GUARD,P_PINQ(F)::QAB1(F),XQ(d)
- R(e);N_GUARD::R1(A)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).